﻿#region Copyright
// Copyright (c) 2011-2012 RaisingForce Team (Alikin Sergey)
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

namespace RaisingForce.Raise.Language.RStates.Internal
{
    internal static class RStateContextStateHelper
    {
        #region Extension Methods

        public static bool Equals(
            IRStateContextState state, 
            IRStateContextState other)
        {            
            return other == null || state == null ?
                object.ReferenceEquals(state, other) :
                state.CounterState == other.CounterState
                && state.CounterValue == other.CounterValue
                && state.CounterInitializedState == other.CounterInitializedState
                && state.CurrentChain == other.CurrentChain
                && state.PreviousChain == other.PreviousChain
                && state.ObjectPosition == other.ObjectPosition;
        }

        public static int GetHashCode(IRStateContextState state)
        {
            return state != null ?
                state.CounterState.GetHashCode()
                ^ state.CounterValue.GetHashCode()
                ^ state.CounterInitializedState.GetHashCode()
                ^ state.CurrentChain.GetHashCode()
                ^ state.PreviousChain.GetHashCode()
                ^ state.ObjectPosition.GetHashCode() :
                0;
        }

        #endregion
    }
}
